\begin{table}

\caption{Registration and Turnout Effects by Program Contact\label{effectsbysource}}
\centering
\begin{tabular}[t]{lccc}
\toprule
  & Voter Registration & Updated Registration & November 2021 Turnout\\
\midrule
(Intercept) & \num{0.021}* & \num{0.020}* & \num{0.015}*\\
 & (\num{0.002}) & (\num{0.003}) & (\num{0.004})\\
Information-Only Mail (T1) & \num{-0.001} & \num{0.003} & \num{0.007}\\
 & (\num{0.004}) & (\num{0.004}) & (\num{0.006})\\
Research-Informed Mail (T2) & \num{0.005} & \num{0.005} & \num{0.010}\\
 & (\num{0.004}) & (\num{0.005}) & (\num{0.006})\\
Probation & \num{-0.003} & \num{-0.006} & \num{-0.020}*\\
 & (\num{0.003}) & (\num{0.004}) & (\num{0.005})\\
Already Registered & \num{0.973}* & \num{0.026}* & \num{0.162}*\\
 & (\num{0.001}) & (\num{0.003}) & (\num{0.004})\\
Information-Only Mail * Probation & \num{0.002} & \num{0.000} & \num{-0.007}\\
 & (\num{0.004}) & (\num{0.005}) & (\num{0.008})\\
Research-Informed Mail * Probation & \num{-0.001} & \num{0.006} & \num{-0.006}\\
 & (\num{0.004}) & (\num{0.006}) & (\num{0.008})\\
\midrule
Num.Obs. & \num{23768} & \num{23768} & \num{23768}\\
\bottomrule
\multicolumn{4}{l}{\rule{0pt}{1em}* p $<$ 0.05}\\
\end{tabular}
\end{table}
